The Oprah Winfrey Network, set to launch in 2011, will benefit from a series of projects created by those stars and others as part of OWN's monthly "Documentary Film Club."

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"All of these documentaries fundamentally explore human interaction, relationships and emotions," Lisa Erspamer, chief creative officer of OWN, said in a statement. "We're excited to provide viewers with new perspectives and new ways of looking at core themes that shape and affect their lives."

Roberts, who is about to star in the big-screen adaptation of Elizabeth Gilbert's "Eat Pray Love," will produce "Extraordinary Moms," which will focus on mothers around the world who fight to create a better world for their children.

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Whitaker's contribution will look at Louisiana's infamous Angola prison to follow the men who work in the hospice wing.

Another star, Gabriel Byrne, will consider homelessness in Nashville in "Tent City."

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In addition to the documentaries, the network will feature a show in which Oprah conducts in-depth interviews, a possible reality show created by "Survivor" producer Mark Burnett and potentially a vehicle for the Duchess of York, Sarah Ferguson.